<template>
    <div class="list" ref="wrapper">
        <div><!-- 为符合使用better-scroll的DOM结构而添加的外层容器 -->
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button active">{{this.$store.state.city}}</div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button" v-for="item of myhotCities" :key="item.id">{{item.name}}</div>
                </div>
            </div>
            <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                    @click="handleCityChange(innerItem.name)"
                    >
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
export default {
    name:'CityList',
    props:{
        hotCities:Array,
        cities:Object,
        letter:String
    },
    data:function(){
        return{
            myhotCities:this.hotCities
        }
    },
    mounted() {
        this.scroll = new Bscroll(this.$refs.wrapper,{});
    },
    watch:{
        letter(){
            if(this.letter){
                const targetElement = this.$refs[this.letter][0];
                this.scroll.scrollToElement(targetElement);
            }
        }
    },
    methods:{
        handleCityChange(city){
            this.$store.dispatch('changeCity',city);
            this.$router.push('/');
        }
    }
}
</script>
<style lang="scss" scoped>
@import '~styles/varibles.scss';
.list{
    position: absolute;
    top:1.58rem;
    left:0;
    right:0;
    bottom:0;
    // background-color: red;
    overflow:hidden;
}
.title{
    line-height: .4rem;
    background-color: #eee;
    padding-left:.2rem;
    color:#666;
    font-size: .26rem;
}
.border-topbottom{
    &:before{
        border-color: #ccc;
    }
    &:after{
        border-color: #ccc;
    }
}
.border-bottom{
    &:before{
        border-color: #ccc;
    }
    &:after{
        border-color: #ccc;
    }
}
.button-list{
    padding: 0 .6rem .2rem .2rem;
    display:flex;
    justify-content: space-between;
    flex-wrap: wrap;
    .button{
        width:30%;
        margin-top: .2rem;
        display: inline-block;
        border:1px solid #ccc;
        border-radius: .05rem;
        text-align: center;
        height: .5rem;
        line-height: .5rem;
    }
    .active{
        border-color: $themeBgColor;
        color:$themeBgColor
    }
}
.item-list{
    box-sizing: border-box;
    margin-right: .6rem;
    .item{
        width:100%;
        height: .6rem;
        line-height: .6rem;
        padding: .1rem 0rem .1rem .2rem;
        color:#666;
    }
}
</style>